# A6 - 70(b Let S={AB,BCD,AD be a decomposition of R For each...

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University of Waterloo School of Computer Science CS348 Spring 2009 Assignment 6 Due: July 14, 2009 1. 30%(a) Let F = {AB C, A D, BD C, C A} be the set of fd’s on R(ABCD). Find all candidate keys of R. Explain your answer.
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Unformatted text preview: 70%(b) Let S={AB,BCD,AD} be a decomposition of R. For each relation scheme in S, find all projected fd’s. Is S in 3NF? Is S in BCNF? Is S a lossless decomposition? Is S dependency preserving? Explain your answers....
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